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Conical Paddle Dryer

The versatile Conical Paddle Dryer by Hosokawa Micron offers extremely fast batch drying in a compact design and is available in a range of sizes, from 5 to 15,000 litres.

Designed to be used vertically, this centrally driven universal dryer utilises the latest drying technology and a unique paddle motion for the pressurised vacuum processing of a wide variety of materials, including loose powders and pastes, and is particularly suitable for material that is heat sensitive and/or brittle. It may also be used for the thermal processing or vacuum treatment of solids. The dryer can be manufactured in all grades of stainless steel, monel, nickel, titanium and Hastelloy and supplied with a range of convenient accessories – such as a sampler, vacuum filter and lump breaker – adding to its versatility.

Product Information

The Conical Paddle Dryer’s patented classifier wheel rotates at 120 metres per second, which equates to a distance of 269 miles per hour, the approximate distance of the Earth from the International Space Station.

The Conical Paddle Dryer quickly and efficiently batch dries materials using thermal energy provided by its efficient jacket – which can be heated in various ways, including by using steam, hot oil or water – in combination with an effective paddle mixing feature. The vacuum created by the dryer allows vapour to be removed at low temperatures, which is perfect for heat-sensitive products or products that are brittle. Vapours are removed via a dust filter located at the top of the dryer, preventing any dust from penetrating the system.

A condenser is fitted to the dryer, which includes a receptacle for capturing solvents. Conveniently, the condenser can be installed before or after the vacuum pump, depending on the solvent’s characteristics.

For monitoring and controlling the moisture content of the material being processed, a sampler can be fitted to the Conical Paddle Dryer, allowing the operator to take samples from inside the dryer while it is under vacuum.

The finished product is discharged into a chosen receptacle via the ball segment valve.

Thermal Processing and Vacuum Treatment of Solids

Though the Conical Paddle Dryer has been designed to vacuum dry solid-based materials, the equipment’s versatility means it may also be used for thermal processing and vacuum treatment of solids, offering a space-saving and economical way to perform multiple processes using one product.

Additional applications include:

  • Chemical reactions (such as alkalisation and solid gas)
  • Crystallisation
  • Wet agglomeration and granulation of solids
  • Product sterilisation
  • Homogenisation of products under vacuum
  • Cooling solids and liquids
  • De-aeration of pastes and liquids


The Conical Paddle Dryer is built to industry standards and can be manufactured in a wide range of materials, such as stainless steel, titanium, Hastelloy and nickel.

Tailor-made drying systems can be designed by our expert design and engineering team. Simply contact us to discuss your specific requirements.

Available in a range of six models, the Conical Paddle Dryer comes in the following model numbers: 5 CPD, 50 CPD, 500 CPD, 1000 CPD, 2000 CPD, 3000 – 15000 CPD. The smallest model (5 CPD) has a capacity of litres, where our largest model can hold up to 15000 litres. (Detailed information on request).

Optional Features

The Conical Paddle Dryer can be upgraded with additional equipment to suit individual processing requirements and/or to meet specific safety standards. Our product experts would be pleased to advise you of the most appropriate and necessary optional features for your processing situation.

  • Vacuum filter
  • Sampler
  • heating/cooling skid
  • Ball segment outlet valve
  • Lump breaker
  • Controls
  • CIP/SIP skid

Batch vacuum dryer for reducing the moisture levels of pastes, granules, powders, filter cakes and viscous liquids (including brittle or heat sensitive materials). Can also be used for crystallisation, polymerization, sterilising products, cooling solids and liquids, vacuum homogenising and de-aerating pastes and liquids.

  • Multi-processing and multi-purpose
  • Super-fast batch drying of powders, filter cakes and viscous liquids
  • Compact design
  • Unique paddle feature
  • Ideal for heat-sensitive and/or brittle materials
  • Range of sizes from 5 to 15,000 litres
  • Fully compliant with international standards (FDA, cGMP, EHEDG)
  • Sterile processing capability
  • Automatic cleaning available via our patented CIP filter and CIP skids
  • Standard and bespoke dryers and systems available

Hosokawa’s Conical Paddle Dryer can be used individually or as part of a bespoke system that may include additional equipment such as a Hosokawa Super Orion S.O. Ball Mill, sieve, cyclone and control cabinet. Complete systems can be designed, engineered, manufactured and commissioned in-house to specific customer requirements.

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Having chosen Hosokawa Micron Ltd to design, manufacture and install your powder and particle processing equipment, you can also trust us to ensure it continues to perform correctly and optimally, protecting your investment while giving you peace of mind.
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